Added ContainsRelocations() to check if a constant might only be resolvable at load time.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35014 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 15 insertions, 0 deletions

diff --git a/include/llvm/Constant.h b/include/llvm/Constant.h
index 985f190..4b3547e 100644
--- a/include/llvm/Constant.h
+++ b/include/llvm/Constant.h
@@ -59,6 +59,10 @@ public:
   /// true for things like constant expressions that could divide by zero.
   bool canTrap() const;
 
+  /// ContaintsRelocations - Return true if the constant value contains
+  /// relocations which cannot be resolved at compile time.
+  bool ContainsRelocations() const;
+
   // Specialize get/setOperand for Constant's as their operands are always
   // constants as well.
   Constant *getOperand(unsigned i) {
diff --git a/lib/VMCore/Constants.cpp b/lib/VMCore/Constants.cpp
index 9d9cc5a..1685923 100644
--- a/lib/VMCore/Constants.cpp
+++ b/lib/VMCore/Constants.cpp
@@ -90,6 +90,17 @@ bool Constant::canTrap() const {
   }
 }
 
+/// ContaintsRelocations - Return true if the constant value contains
+/// relocations which cannot be resolved at compile time.
+bool Constant::ContainsRelocations() const {
+  if (isa<GlobalValue>(this))
+    return true;
+  for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
+    if (getOperand(i)->ContainsRelocations())
+      return true;
+  return false;
+}
+
 // Static constructor to create a '0' constant of arbitrary type...
 Constant *Constant::getNullValue(const Type *Ty) {
   switch (Ty->getTypeID()) {